MARTA is a transportable laboratory chiller based on evaporation of liquid CO2. Its technology uses as a basis the TRACI (Transportable Refrigeration Apparatus for CO2 Investigation) – originally developed at CERN. MARTA has been designed by joint effort of CEBEA Bochnia, the Cracow University of Technology  PONAR Wadowice  all strongly supported by the CERN EP-DT group.


COOLING POWERmax. 200 W w -30°C, tambient 22°C (300W at -25°C)max. 300 W w -30°C, tambient 22°Cmax. 600 W w -30°C, tambient 22°C
MAX. HEAD PRESSURE6 bar6 bar6 bar
MASS FLOW-METERoptionoptionoption
SIZE [HxWxD]1370x780x7001370x780x700TBD
WEIGHT [kg]180210TBD
CO2 MASS FLOWA RATEAutomatic + manual valveAutomatic + manual valveAutomatic + manual valve
CO2 TEMPERATURE CONTROLAutomaticAutomaticAutomatic
DESKTOP SOFTWAREoptionoptionoption
ANALOG INPUT AND OUTPUToptionoptionoption
DIGITAL INPUT AND OUTPUToptionoptionoption
CO2 TRANSFER LINE (STANDARD3m)optionoptionoption
LOCAL BOXoptionoptionoption


MARTA cooling system is equipped with touch panel to control complete unit. After start of the machine HMI displays MAIN screen

MAIN screen displays all of controllers and set points which can be changed. If any alarm will be triggered it will be indicated in the top of the table. Bottom of the screen is used to Start and Stop system. Main, P&ID, Settings and Alarms buttons change displayed screen.


Process and Instrumentation Diagram (P&ID) screen shows all controlled objects, measurement points and several important calculated variables.

Measurement points are given in white labels, calculated variables are given in yellow labels. Violet lines indicate chiller side while blue and red lines indicate CO2 (red is a return from experiment). On the right side of P&ID screen, set points from “Main” screen are displayed. All of measurement points and calculated variables can be clicked. When clicked, extra popup window will be shown which displays time plot and button for manual (forced) setting of valve opening.

Y-axis of plot is scalable from -50 to 999. For example, values 0.00 and -25.00 on the screen can be changed by clicking (special numeric keyboard will be shown to set values). “P&ID” screen has additional TRENDS button.


Next is SETTINGS screen. On this screen operator can see current settings i.e. date and time, IP configuration, check status of Modbus server and also save data logs to USB or login as Administrator. If user is logged as Admin more permissions are granted and it is possible to change date and time, IP configuration. Only if logged as Admin, operation modes of CO2 pump and bypass valves can be changed on “P&ID screen”. IP configuration concerns Modbus TCP/IP.

If operator is logged out, the maximum speed of pump is 5000rpm. When logged in, maximum speed increases to 6000rpm.


Last screen, ALARMS displays all of alarms which were triggered during operation of MARTA unit. Alarms can be acknowledged by using button “Acknowledge”. Additionally, if any full stop alarm will indicated, ALARMS button will change color to red. Full stop alarms are red, other alarms are yellow.

This screen displays errors that occurred during MARTA’s operation i.e. temperature exceeded or too low refrigerant level. When malfunction appears proper information is shown on this screen and ERRORS button in the main menu at the bottom changes color to red.

Optional features

Local Box Local Box is a very convenient manual device for local control of CO2 flow in experiment. It includes set of manual valves for control, refilling and venting of CO2 in experiment.

Remote Access MARTA can be controlled remotely within local web by any PC with internet browser installed. Touch panel screen is then accessible like a web page and it’s possible to control MARTA just like when standing next to it.

Connectivity MODBUS connection is an optional feature that enables receiving and sending signals from and to MARTA unit. Transfer details are to be discussed when ordering. Possible received signals: temperature setpoint, pump rotation, start/stop, possible sent signals: working status, all measured and calculated values

Desktop software Windows application can be delivered with MARTA to process all data logged while operating unit. Using this tool gives you opportunity to draw time-based charts and relationship graph between any two parameters, add ranges, place several trends on one chart and print it.

Signal by wire (Analog and Digital IO) MARTA can be delivered with industrial connector that enables to set hardware connection with unit. Choosing this option lets you send discrete signal start/stop and receive discrete signals of working status and safety pushbutton state. Additionally there are two analogue (4-20mA) inputs and two analogue outputs (4-20mA) to use. Details to be determined when ordering.

Other Power Supply standards It is possible to prepare MARTA for non-European voltage standards such as the United States of America, Japan, Australia, and other on request.

Our contractors:

  • University in Bonn  – Germany
  • University of Massachusetts Amherst  – USA
  • Laboratoire d’Annecy-le-Vieux de Physique des Particules LAPP – France
  • CERN, The European Organization for Nuclear Research – Switzerland
  • TRIUMF  – Canada’s particle accelerator Centre – Canada
  • Bergische Universität Wuppertal – Germany
  • The University of Manchester – UK
  • CPPM  – Centre de Physique des Particules de Marseille – France
  • LLR Ecole Polytechnique – France
  • Deutsches Elektronen-Synchrotron  DESY – Germany
  • Deutsches Elektronen-Synchrotron  DESY ATLAS – Germany
  • CERN – Switzerland
  • UCLouvain – Belgium
  • CERN INFN Pisa – Italy
  • CERN PSI – Switzerland
  • CERN IPHC Strasbourg – France
  • CERN Uni Zurich – Switzerland
  • CERN INFN Torino – Italy
  • CERNIIT Bhubaneswar – India
  • IFIC Valencia – Spain
  • INFN Genova – Italy
  • INFN Lecce – Italy


CEBEA Bochnia

+48 14 611 70 51

Technical advisor: dr Ryszard Kantor – Cracow University of Technology

+48 12 628 35 85

dr Jan Godlewski